Common\Doctrine\ValueObject\AbstractImage::getUploadRootDir PHP Method

    protected function getUploadRootDir($subDirectory = null)
    {
        // the absolute directory path where uploaded
        // documents should be saved
        if ($subDirectory !== null) {
            return parent::getUploadRootDir() . '/' . $subDirectory;
        }
        return parent::getUploadRootDir();
    }